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[en] The main characteristics of the new version 1.2 of the three-dimensional Earth system model of intermediate complexity LOVECLIM are briefly described. LOVECLIM 1.2 includes representations of the atmosphere, the ocean and sea ice, the land surface (including vegetation), the ice sheets, the icebergs and the carbon cycle. The atmospheric component is ECBilt2, a T21, 3-level quasi-geostrophic model. The ocean component is CLIO3, which consists of an ocean general circulation model coupled to a comprehensive thermodynamic-dynamic sea-ice model. Its horizontal resolution is of 3° by 3°, and there are 20 levels in the ocean. ECBilt-CLIO is coupled to VECODE, a vegetation model that simulates the dynamics of two main terrestrial plant functional types, trees and grasses, as well as desert. VECODE also simulates the evolution of the carbon cycle over land while the ocean carbon cycle is represented by LOCH, a comprehensive model that takes into account both the solubility and biological pumps. The ice sheet component AGISM is made up of a three-dimensional thermomechanical model of the ice sheet flow, a visco-elastic bedrock model and a model of the mass balance at the ice-atmosphere and ice-ocean interfaces. For both the Greenland and Antarctic ice sheets, calculations are made on a 10 km by 10 km resolution grid with 31 sigma levels. LOVECLIM1.2 reproduces well the major characteristics of the observed climate both for present-day conditions and for key past periods such as the last millennium, the mid-Holocene and the Last Glacial Maximum. However, despite some improvements compared to earlier versions, some biases are still present in the model. The most serious ones are mainly located at low latitudes with an overestimation of the temperature there, a too symmetric distribution of precipitation between the two hemispheres, and an overestimation of precipitation and vegetation cover in the subtropics. In addition, the atmospheric circulation is too weak. The model also tends to underestimate the surface temperature changes (mainly at low latitudes) and to overestimate the ocean heat uptake observed over the last decades.
Disciplines :
Sciences de la terre & géographie physique
Auteur, co-auteur :
Goosse, H.; Université Catholique de Louvain - UCL > Earth and Life Institute > Georges Lemaître Centre for Earth and Climate Research
Brovkin, V.; Max Planck Institute for Meteorology
Fichefet, T.; Université Catholique de Louvain - UCL > Earth and Life Institute > Georges Lemaître Centre for Earth and Climate Research
Haarsma, R.; Royal Netherlands Meteorological Institute (KNMI)
Huybrechts, P.; Vrije Universiteit Brussel - VUB > Earth System Sciences & Departement Geografie
Jongma, J.; Vrije Universiteit Amsterdam - VU > Dept. of Earth Sciences > Section Climate Change and Landscape Dynamics
Mouchet, Anne ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)
Selten, F.; Royal Netherlands Meteorological Institute (KNMI)
Barriat, P.-Y.; Université Catholique de Louvain - UCL > Earth and Life Institute > Georges Lemaître Centre for Earth and Climate Research
Campin, J.-M.; Massachusetts Institute of Technology - MIT
Deleersnijder, E.; Université Catholique de Louvain - UCL > Institute of Mechanics > Materials and Civil Engineering
Driesschaert, E.; International Polar Foundation
Goelzer, H.; Vrije Universiteit Brussel - VUB > Earth System Sciences & Departement Geografie
Janssens, I.; Vrije Universiteit Brussel - VUB > Earth System Sciences & Departement Geografie
Loutre, M.-F.; Université Catholique de Louvain - UCL > Earth and Life Institute > Georges Lemaître Centre for Earth and Climate Research
Morales Maqueda, M. A.; Proudman Oceanographic Laboratory
Opsteegh, T.; Royal Netherlands Meteorological Institute (KNMI)
Mathieu, P.-P.; Université Catholique de Louvain > Earth and Life Institute > Georges Lemaître Centre for Earth and Climate Research
Munhoven, Guy ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP) - Pétrologie, géochimie endogènes et pétrophysique
Pettersson, E. J.; Université Catholique de Louvain - UCL > Earth and Life Institute > Georges Lemaître Centre for Earth and Climate Research
Renssen, H.; Vrije Universiteit Amsterdam - VU > Dept. of Earth Sciences > Section Climate Change and Landscape Dynamics
Roche, D. M.; Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL
Schaeffer, M.; Royal Netherlands Meteorological Institute (KNMI)
Tartinville, B.; Numeca International
Timmermann, A.; University of Hawai'i > SOEST
Weber, S.; Royal Netherlands Meteorological Institute (KNMI)
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE] BELSPO - SPP Politique scientifique - Service Public Fédéral de Programmation Politique scientifique INSU/CNRS NWO - Nederlandse Organisatie voor Wetenschappelijk Onderzoek [NL]
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